BAPI_ACC_ACTIVITY_ALLOC_POST = KB21N

RFC BAPI_ACC_ACTIVITY_ALLOC_POST = t-code  KB21N

reverse t-code : KB24N

* call function 'BAPI_ACC_ACTIVITY_ALLOC_POST'
*        exporting
*             doc_header      = lf_doc_header
*             ignore_warnings = 'X'
*        importing
*             doc_no          = lf_doc_no
*        tables
*             doc_items       = lt_doc_items
*             return          = lt_messages2.